Free audio
From Superuser Wiki
Free audio, like Free Software, is audio that can freely be copied, distributed and modified for any purpose. Below is a list of sites that have Free audio available. Its a pleasure to listen to these artists but you can also use/remix the audio in your own projects. Make sure to check the copyright license and support the Free Culture movement.
Music
Diesel-U-Music
The 2006 edition of this international music contest was open to unsigned artists playing rock, urban/hip-hop, and electronic music. This year's entries are licensed to the public under the CC Attribution-NonCommercial 2.5 license.
Jamendo
Provides an archive of CC-licensed music that's available for download via P2P. Jamendo features tags, user reviews and personalized recommendations, so you can easily find new tunes that suit your tastes.
ccMixter
A music remix site that tracks samples across different artists, all available under sampling licenses so that you too can join in the mix.
Magnatune
A new music label focused on try-before-you-buy music. Features licensed, downloadable tracks from a wide variety of artists that can also be purchased direct from the site
SectionZ
An electronic music community that offers Creative Commons-licensed tracks from genres like IDM, drum 'n' bass, and ambient.
Dmusic
The oldest online digital music community, DMusic offers Creative Commons licenses for artists hosting their music.
Opsound
Features a pool of Creative Commons licensed audio. You may submit your MP3s
SoundClick
Thousands of licensed music files are available here, on this community music hosting service.
Freesound
A collaborative database of Creative Commons licensed sounds.
Musikethos
Its primary objective is that of spreading through the web musical culture as much as possible, making use of musical recordings made available by young professional musicians part of the Musica Etica (ethical music) association, founded in Perugia in August 2006.
Wolfgang Amadeus Mozart
Entire collection of Wolfgang Amadeus Mozart's work in mp3 format.
Real World Remixed
Download 'sample packs' of audio from Real World Records and create remixes using whatever you want.
European Archives
The European Archive is a digital library of cultural artifacts in digital form.Fantastic collection of 1500 LP classical music.
Kahvi
The mission is to gather and provide free electronic grooves.
Krayola Records
Krayola Records is a record label that offers music, videos and draw-it-yourself covers. Works can be downloaded for free under Creative Commons licenses.
LOCA Records
LOCA is releasing music under so-called copyleft, a license that enables music writers to develop music collaboratively and equitably and then release it into the commons.
Wikimedia Commons Category Music Sound
Wikimedia collection of free audio files
Audio Books
LibriVox
Librivox is a digital library of free public domain audio books, read by volunteers
LiteralSystems
"What this country needs is more free speech worth listening to." - Hansell B. Duckett
Other
Internet Archive Audio
This collection ranges from alternative news programming, to Grateful Dead concerts, to Old Time Radio shows, to book and poetry recordings, to original music contributed by users.
OYEZ
Years of Supreme Court proceedings available as licensed MP3, with more to come